Theoretically anything is possible, but very little is known about the 1G-GTE here in the states as nobody wants to swap to a 2.0L. It'd be a sweet engine for a MK2 though.
There's been 2JZ-GTE, 1JZ-GTE, and 7M-GTE swaps into MK2's so theres no reason it couldn't be made to work.
I know that's not much help, I wish I knew more about the 1G-GTE...
yep Jeff's got it... they came with the 1gge stock so i would say engine mounts for the mk2... i might have a source for stock ones i'll find out for ya... wiring harness, ecu then splice n dice for the dash to work